objective-c : CoreData : fetchRequest, sortDescriptor, filter using predicate, show resulting Array object using for loop

snippet.m

//sample code
//CoreData : fetchRequest, sortDescriptor, filter using predicate, show resulting Array object using for loop

- (void)demo {
    if (debug==1) {NSLog(@"Running %@ '%@'", self.class, NSStringFromSelector(_cmd));}
    
    //데모 데이터
//    NSArray *newItemNames = [NSArray arrayWithObjects:
//                             @"Apples", @"Milk", @"Bread", @"Cheese", @"Sausages", @"Butter", @"Orange Juice", @"Cereal", @"Coffee", @"Eggs", @"Tomatoes", @"Fish", nil];
//    
//    for (NSString *newItemName in newItemNames) {
//        Note *newItem = [NSEntityDescription insertNewObjectForEntityForName:@"Note"
//                                                      inManagedObjectContext:_coreDataHelper.context];
//        newItem.noteTitle = newItemName;
//        NSLog(@"Inserted New Managed Object for '%@'", newItem.noteTitle);
//    }
    
    //fetchRequest
    //NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:@"Note"];
    
    //fetchRequest using predefining fetch template
    NSFetchRequest *request = [[[_coreDataHelper model] fetchRequestTemplateForName:@"Test"] copy];
    
    //sortDescriptor
    NSSortDescriptor *sort = [NSSortDescriptor sortDescriptorWithKey:@"noteTitle" ascending:YES];
    
    //request with sortDescriptor
    [request setSortDescriptors:[NSArray arrayWithObject:sort]];
    
    //filter using predicate (delete because now using predefining fetch template)
    //NSPredicate *filter = [NSPredicate predicateWithFormat:@"noteTitle != %@", @"Coffee"];
    //[request setPredicate:filter];
    
    //resulting Array
    NSArray *fetchedObjects = [_coreDataHelper.context executeFetchRequest:request error:nil];
    
    //show resulting Array object using for loop
    for (Note *item in fetchedObjects) {
        NSLog(@"Fetched Object = %@", item.noteTitle);
    }
}

//test code
- (void)applicationDidBecomeActive:(UIApplication *)application
{
    if (debug==1) {NSLog(@"Running %@ '%@'", self.class, NSStringFromSelector(_cmd));}
    [self demo];
}